Intro
Corrosion Under Insulation (CUI) Guidelines: Technical Guide for Managing CUI
Copyright
Dedication
Contents
European Federation of Corrosion (EFC) publications: Series introduction
Volumes in the EFC series list
1 Introduction
1.1 Purpose of the document
References
2 Economic consideration
2.1 Statistical analysis
2.2 Size of the issue
2.2.1 Safety and integrity
2.2.2 Environment
2.2.3 Revenue or production loss
2.2.4 Reputation
2.2.5 Collateral damage cost
2.2.6 Online leak sealing cost
2.2.7 Repair and/or replacement, fabrication and installation costs
2.2.8 Fitness for continued service
2.2.9 On-stream inspection and non-destructive examination and testing
2.3 Key performance indicators
3 Ownership and responsibility
3.1 Senior management
3.2 Engineering manager
3.3 Maintenance
3.4 Operations
3.5 Inspection
3.6 Members of a project team
Corrosion-under-insulation program
3.7 Engineering and EPC(m)
4 The risk-based inspection methodology for CUI
4.1 Introduction
4.2 High-level prioritization
4.2.1 Health & safety consequences (A)
4.2.2 Environmental consequences (B)
4.2.3 Economic consequences (C)
4.2.4 Impact on reputation (D)
4.3 Data validation
4.3.1 The need for data validation
4.3.2 Different aspects of a data validation
4.3.3 Implementation of data validation
4.3.4 CUI and mothballing of equipment
4.4 Challenging the need for insulation
4.5 Using RBI to design CUI inspection plans
4.5.1 Preparation of an RBI analysis
4.5.2 Susceptibility factors
4.5.2.1 Operating temperature
4.5.2.2 Coating status
4.5.2.3 Cladding/insulation condition
4.5.2.4 Available corrosion allowance
4.5.2.5 External coil/steam tracing
4.5.2.6 External environment
4.5.3 Qualitative RBI analysis
4.5.4 Semiquantitative RBI analysis
4.5.4.1 Consequence of CUI failure
4.5.4.2 Probability of CUI failure
4.5.4.3 Risk of CUI failure
5 Inspection activities and strategy
5.1 General considerations
5.2 Typical locations on piping circuits susceptible to corrosion-under-insulation
5.3 Typical locations on equipment susceptible to corrosion-under-insulation
5.3.1 Vessels, columns and tanks
5.3.2 Heat exchangers
5.4 Examples of a risk-based inspection plan
5.4.1 Evaluated risk level: High-extreme
5.4.2 Evaluated risk level: Medium-high
5.4.3 Evaluated risk level: Medium
5.4.4 Evaluated risk level: Low
5.4.5 Evaluated risk level: Negligible
6 Non-destructive examination and testing screening techniques for corrosion-under-insulation
6.1 Non-destructive examination and testing techniques
Reference
7 Recommended best practice to mitigate CUI
7.1 Background
7.1.1 Key parameters
7.1.2 Assumptions